US Bridges

E470WB Ramp to 25 over I 25 SH 470 Ml R

Fair

Douglas County, Colorado · Mid-Level Above JCT I-25 · Structure no. F-17-JW

Built
1991
34 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Steel Continuous
Length
638 ft
5 main spans
Daily traffic
80,000
2020 count
Owner
State
State Highway Agency

About this bridge

E470WB Ramp to 25 over I 25 SH 470 Ml R is a steel continuous box beam or girders - single or spread carrying E470WB Ramp to 25 over I 25 SH 470 Ml R in Douglas County, Colorado. It was built in 1991, so it is 34 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 80,000 vehicles a day, roughly 6% of them trucks, projected to reach 110,400 by 2040. The structure is 638 ft (194.5 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesE470WB Ramp to 25
CrossesI 25 SH 470 Ml R
LocationMid-Level Above JCT I-25
RouteInterstate 25A
Coordinates39.55457, -104.87086
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length638 ft (194.5 m)
Longest span148 ft (45 m)
Deck width31 ft (9.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck56 ft (17.1 m)

Traffic and service

Average daily traffic80,000 (2020)
Projected traffic110,400 by 2040
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was E470WB Ramp to 25 over I 25 SH 470 Ml R built?

It was built in 1991, making it 34 years old in 2025.

What condition is E470WB Ramp to 25 over I 25 SH 470 Ml R in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does E470WB Ramp to 25 over I 25 SH 470 Ml R carry?

About 80,000 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is E470WB Ramp to 25 over I 25 SH 470 Ml R?

The structure is 638 ft (194.5 m) long with a longest span of 148 ft (45 m) and a deck 31 ft wide.

Who owns E470WB Ramp to 25 over I 25 SH 470 Ml R?

It is owned by the State Highway Agency.